Method and apparatus for bringing paper stock onto the wire of alpha paper-making machine



Sept. 26, 1933. R T LANG 1,928,107

METHOD AND APPARAT'us'FoR BRINGING PAPER STOCK ONTO THE WIRE OF APAPER-MAKING MACHINE Filed Sept. 30, 1932 Patented Sept. 26, 1933 UNITEDSTATES METHOD AND APPARATUS FOR BRINGING PAPER STOCK ONTO THE WIRE OF APAPER-MAKING MACHINE Richard T. Lang,

lleidcnheim-on-the-Brenz,

Germany, assignor to American Voith Contact Company, lnc., New York, N.Y., a corporation of New York Application September 30, 1932, Serial No.

635,628, and in 7 Claims.

The invention relates to an apparatus and a method of bringing paperstock onto the wire of a paper-making machine. The invention has for itsobject to provide means for the regulation of the stock jet passing ontothe wire both as to the direction in which and the place at which thestock jet strikes the wire.

In Fourdrinier machines and pulp-drying machines it is known practice tofeed the paper stock onto the wire through a feed orifice having anupper and a bottom lip, the speed at which the stock leaves theorifices, being substantially the same as the speed at which the wiretravels. In such practice, the operating speed, and therewith the speedof travel of the wire, require primarily a corresponding change in thelevel of the paper stock in the head box, while changes in theconsistency and in the freeness of the paper stock are primarilycorrected by varying the distance between the upper and bottom lip ofthe discharge orifice of the head box. Such a regulation of the stocklevel in the head box and an adjustment of the distance between upperand bottom lip of the orifice are not satisfactory in the efiicientoperation of such machines.

This invention provides a method and means to change the discharge anglein which the stock jet or current strikes the wire, as also the place atwhich it strikes the wire. Preferably such change in direction, andchange in location of the impact of the jet, is carried out in additionto the regulation of head box level, and the lip adjustment. Inaccordance with this invention, this is accomplished by so changing therelative position of the jet orifice, which has been adjusted tocorrespond to a certain working speed and stock consistency, in respectto the breast roll over which the wire travels, by either raising orlowering the head box relative to the breast roll, or moving it closerto or away from the breast roll, or by tipping the head box, or bycarrying out one or more of these various actions, until both the angleof impingement and the point at which the stock strikes the wire havebeen adapted to the then prevailing conditions as to working speed andcondition of the stock, and in such a measure as to give the bestpractical results.

The invention consists in the method of causing the discharge fiow ofthe stock jet in respect to the breast roll or the wire passing over it,at a definite angle with respect to the wire, varying as required by theprevailing conditions as to working speed and condition of stock,thereby resulting in the impact of the stock jet at such a point on thewire as required. The variation of angu- (lermany October 3, 1931 lardischarge and point of impact of the stock current or jet in respect tothe wire and breast roll, is in connection with a jet orifice which hasbeen adjusted to a certain working speed and stock consistency. Theinvention consists further in the novel apparatus hereinafter described,which consists essentially of a displaceable jet orifice adapted to beraised or lowered, or laterally moved in respect to the breast roll, ortilted in respect thereto, to vary the direction and point of impact ofstock flow to the wire.

The invention will be more fully described hereinafter, embodimentsshown in the drawing, and finally pointed out in the claims.

In the accompanying drawing,

Figure 1 shows diagrammatically, one position of the stock orifice inrespect to the breast roll and wire;

Figure 2, another position of the same;

Figure 3 is a longitudinal section through the head box and orifice ofone embodiment of the invention;

Figure 4 shows an end or rear View of the embodiment shown in Figure 3,and more particularly the head box as seen in the direction of the flowof stock; and v Figure 5 shows a section of another embodiment.

Referring to the drawing, and more particularly to Figures 1 and 2, thebreast roll E has the wire D passing thereover as is well known.

In relation to this breast roll E and wire D, a stock orifice C, isplaced, which is capable of being moved upwardly or downwardly, orhorizontally to and fro, or tilted from the position shown. This stockorifice having been adjusted as to working speed and as to condition ofstock, directs the stock jet or current flowing out of the orificeagainst the wire at a certain angle, the median dot-dash line indicatingthe angle .of flow. The crossing of this line with the wire indicatesthe point of impact. In Figure 1, one angle of flow and point of impactis shown. In Figure 2 another angle and point of impact is shown. Theseare diagrammatic representations showing different angles of flow anddifferent impact points, in accordance with the invention therein setforth. Various means may be provided to vary this angle of flow andpoint of impact in respect to the breast roll and wire. The methodconsists in causing the stock to flow to the wire at various differentangles with correspondingly different localities of impact relative tothe axis of the breast roll.

This method is also embodied in a novel structure, as shown in Figures 3and 4. The known head box A has the known equalizer roll B, and knownoriilee C consisting in the embodiment shown of a lower lip C and anadjustable lip C The paper stock as is well known passes from the headbox A. through or around the equalizer roll B, and between the lips C C,onto the wire D passing around the breast roll.

The novel features of the embodiment shown in Figures 3 and 4, consistin having the head box supported in such a way that it can be raised orlowered, or laterally displaced in respect to the breast roll, or tiltedin respect to the wire. For this purpose, the lower part of the head boxA is provided with a yoke-like extension which has arotatable bolt Mseated in the lower and .upper parts of the yoke, and passing through ablock N secured to a standard G. By applying a rotary movement in onedirection to the bolt M, at its exposed head F, the head box is raised,and by applying a rotary movement in the other direction, the head boxis lowered. The block N is rotatably pivoted to the standard by means ofthe pin H extending from the block N into the standard G. A rotarymovement of the block N around the axis of the pin u! bolt H, bringsabout a tilting of the head box in respect to the wire. To move thestock orifice laterally towards and from the breast roll E, the lowerpart of the standard G is guided in the fixed foundation plate J havinga guide I. The standard G has a depending portion 0 which is engaged bya spindle P, which is turned in one or the other direction by anexterior gear Q actuated by another bevel gear R, rotated by a handwheel S. By operating hand wheel S in one or the other direction, thestandard G is moved and hence the stock head box is displaced laterallyin respect to the breast roll E.

By moving standard G and with it head box A laterally in the foundationplate I, orifice C can be moved closer to or away from breast roll E inthe direction of the flow of stock. By tipping head box A around bolt Hin standard G at a right angle to the direction of the flow of stock,the path of discharge of the stock current towards wire D is changed. Byraising or lowering head box A relative to standard G both the directionin which and the point at which the stock current strikes the wire canbe changed. These operations may be carried out singly or jointly inorder to determine the angular path of flow of the stock and its pointof impact on the wire. By thus varying the point of impact of the stockstream with respect to the breast roll and its angle of impingement uponthe wire in accordance with the speed of movement of the wire and theconsistency of the paper stock, excessive disturbance of the stock uponstriking the wire is avoided and a web of uniform thickness assured.Therefore, the machine may be operated at maximum speed and a highquality output of various different grades of paper obtained.

Instead of changing the position of the entire head box A relative tobreast roll E, it is also possible to change jointly in their relativeposition to the breast roll, the two orifice lips C and C together withthe device for adjusting the orifice opening, as shown in the embodimentillustrated in Figure 5.

The invention 0! this novel method has been shown as applied to the wireof a paper-making machine, and embodiments of the invention of the novelstructures have been described and shown. Changes may be made thereinwithout departing from the spirit of the invention, as

defined in the appended claims.

I claim:

1. An apparatus for feeding paper stock onto the wire of a paper-makingmachine, consisting of a head box having a discharge orifice, and meansfor moving said orifice in different directions to divert the flow ofstock in different directions with respect to the wire, and to impingethe stock jet at varying points on the wire.

2. An apparatus for feeding paper stock onto the wire of a paper-makingmachine, consisting of a head box having a discharge orifice, means formoving said orifice in different directions to divert the flow of stockin different directions in respect to the wire, and to impinge the stockjet at varying points on the wire, said orifice being tiltable inrespect to the wire, and movable vertically up or down, or laterally toand fro, in respect to the breast roll.

3. The method of feeding paper stock onto the wire of a paper-makingmachine by means of an orifice with an upper and a bottom lipcharacterized in that the stock current discharged through the orifice,as regards its horizontal or vertical distance from the wire, oritsdirection, as regards these factors combined, is changed until thedirection in which and the point at which said stock current strikes thewire have been adjusted to correspond to the then prevailing conditionsas to working speed and condi-.--

tion of stock.

4. Stock feeder head box for paper machines having a discharge orificeformed by an upper and bottom lip, means for moving the head boxrotatably around a horizontal axis positioned at a right angle to thedirection of the flow of stock, and means for moving the head boxvertically and horizontally.

5. Stock feeder for paper machines having a discharge orifice formed byan upper and bottom lip, including means for moving the two orifice lipsrotatably around a horizontal axis positioned at a right angle to thedirection of flow of stock, and means for moving the same vertically andhorizontally.

6. In the operation of paper-making machines, variably positioning theangle of discharge flow of the paper stock relative to the plane of thewire to correspondingly determine the impingement angle and point ofimpact of the stock upon the wire with respect to the axis of the breastroll, in accordance with the consistency of the stock and the speed ofthe wire.

7. In stock-feeding apparatus for paper-making machines, a dischargeorifice, and means for bodily adjusting said orifice to differentangular positions relative to the plane of the papermaking wire tocorrespondingly determine the angle of discharge flow of the stock andthe point of impact of the stock stream upon the wire with respect tothe axis of the breast roll.

